Terahertz emission from low-temperature grown gallium arsenide photoconductive antenna: A comparative analysis using Drude-Lorentz, Equivalent Circuit Models, and Finite Element Analysis

Authors

Eros Henry Jay D. Acosta ⋅ PH National Institute of Physics, University of the Philippines Diliman
Lourdes Nicole F. Dela Rosa ⋅ PH National Institute of Physics, University of the Philippines Diliman
Jose Mari Sebastian C. Arcilla ⋅ PH National Institute of Physics, University of the Philippines Diliman
Kenneth Alaba ⋅ PH National Institute of Physics, University of the Philippines Diliman
Ivan Cedrick M. Verona ⋅ PH National Institute of Physics, University of the Philippines Diliman
Hannah R. Bardolaza ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer S. Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

In this work, the terahertz emission from low-temperature-grown GaAs photoconductive antennas was simulated via Drude-Lorentz Model, Equivalent Circuit Model (ECM), and Finite Element Analysis (FEA) and were compared to experimental data. Results show that the THz peak amplitude calculated via FEA closely matches (~1.04x) the experimental THz peak amplitude. The THz peak amplitudes calculated from the Drude-Lorentz and ECM are ~3.01x higher and ~ 4.05x lower as compared to the experimental result, respectively. Furthermore, from the emission spectra, the calculated bandwidth from FEA is ~1 THz bandwidth which closely matches the experimental result of ~2 THz. Meanwhile, the calculated bandwidth for both Drude Lorentz and ECM models is ~5 THz.

Issue

2025: Proceedings of the 43rd Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2025-PB-40

Section

Poster Session PB (Theoretical Physics, High Energy Physics, Astrophysics)

Published

2025-06-18

How to Cite

[1]

EHJD Acosta, LNF Dela Rosa, JMSC Arcilla, K Alaba, ICM Verona, HR Bardolaza, and ES Estacio, Terahertz emission from low-temperature grown gallium arsenide photoconductive antenna: A comparative analysis using Drude-Lorentz, Equivalent Circuit Models, and Finite Element Analysis, Proceedings of the Samahang Pisika ng Pilipinas 43, SPP-2025-PB-40 (2025). URL: https://proceedings.spp-online.org/article/view/SPP-2025-PB-40.